PTX3 and age-related macular degeneration: Similar protein levels were found in both groups with a trend towards increasing concentrations in AMD (805.2 ± 94.21 and 917.3 ± 121.1 pg/ml in non-AMD and AMD groups, respectively), indicating that soluble PTX3 (i.e., non-associated to the BrM) is present in the human eye both in physiological and pathological conditions.